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. 2020 Mar 17;11:422. doi: 10.3389/fmicb.2020.00422

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Copyright © 2020 Pang, Wu, Zhang, Huang, Wu, Zhang, Li, Ding, Zhang, Chen, Wei, Zhang, Gu, Zhou, Liang, Li and Wu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Comparison on the accessory gene profiles among the isolates. The differences in accessory gene contents are presented by a heatmap of the gene content correlation matrix. The dendrograms across the top and side indicate the hierarchical clustering by gene content. Isolates that were source from the same food sample are marked up with colored stars. Isolates estimated to have been involved in recent local transmission are marked with yellow, and those estimated to have been involved in recent cross-country transmission are marked with green.